CN109789356B - Diaphragm pump for fluidizing and transporting powder - Google Patents
Diaphragm pump for fluidizing and transporting powder Download PDFInfo
- Publication number
- CN109789356B CN109789356B CN201780058412.2A CN201780058412A CN109789356B CN 109789356 B CN109789356 B CN 109789356B CN 201780058412 A CN201780058412 A CN 201780058412A CN 109789356 B CN109789356 B CN 109789356B
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- CN
- China
- Prior art keywords
- diaphragm pump
- diaphragm
- powder
- gas
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
- B01D39/2027—Metallic material
- B01D39/2051—Metallic foam
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/22—Arrangements for enabling ready assembly or disassembly
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/10—Filtering material manufacturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/12—Special parameters characterising the filtering material
- B01D2239/1216—Pore size
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
- F04B43/06—Pumps having fluid drive
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
The invention relates to a diaphragm pump for fluidizing and transporting powder, the pressure-resistant housing of which is formed by two half-shells (1, 12) which are connected by a first flange connection (2) and in which a diaphragm (3) and a loosening surface (5) for feeding a swirling or pressurized gas into a pressure vessel of the diaphragm pump are connected by a second flange, wherein a uniform gas feed is achieved via the half-shell-shaped loosening surface (5) which is designed to be gas-permeable, and the filter material for the loosening surface (5) is formed by a porous metal having a sufficiently small pore size and a filter fineness of <20 [ mu ] m.
Description
Technical Field
The invention relates to a diaphragm pump for fluidizing and transporting powder.
Background
The body produced according to the method of the invention can advantageously be used as a filter element as a loose surface in a diaphragm pump for fluidizing and pressurizing a powdery product, for example coal dust, with the aid of an inert gas at a pressure of up to 7 mpa.
The continuous and economical transport of a dense flow as the powder quality of the pulverized fuel for coal and biomass gasification plants changes is gaining increasing importance, for example, in order to operate the gasification plants more economically and with high availability. This target setting is achieved in a particular way in the case of the use of a diaphragm pump as proposed in patent application DE102016201182 on 27/1/2016. In this case, the powdery material to be conveyed is sucked from below into the diaphragm pump, pressurized and fluidized in the next step, and then discharged under pressure. After the delivery of the conveying material, the gas volume remaining in the powder chamber of the diaphragm pump is relieved in a final step and the pump cycle is restarted. Due to the (discontinuous) mode of operation of the cycle, it is common to interconnect a plurality of pump heads in order to ensure continuous operation. For this purpose, the individual pump cycles are operated out of phase with one another. Filter materials which meet the requirements with regard to compressive strength and temperature stability are, for example, the metal filter fabrics, sintered metals and sintered plastics described in DE 102012216084. These robust materials described are only available in flat or plate-like structures and cannot be obtained in the required size or dimension. Due to the required fineness of filtration and damage to or oiling of the porous filter structure during machining, machining into other geometries, for example into half shells, is not possible.
Produced by Hayntz M Neuger (Heinz M.
) One-way process pump with redundant hose membrane clamping device for process pumps with a monitored status, which was known from industrial pump + compressor, p 3, 120-123 of elsen volcano press, 16, 2010, under the title "process pump with redundant hose membrane clamping device (processpump mit zustands-umber reducer-membrane-einsn), the integrity of the double membranes of which is monitored by means of a connection on a membrane rupture indicator and a coupling liquid.
Disclosure of Invention
The object of the invention is to provide a filter element for feeding swirling and pressurized gas into a pressure vessel of a diaphragm pump, which filter element combines the requirements: compressive strength, temperature stability, sufficient fineness of filtration, low complexity and compatibility with the membrane for high membrane availability. It is also an object of the present invention to provide a diaphragm pump for fluidizing and transporting powder.
The object is achieved by a diaphragm pump for fluidizing and transporting powder, having the features described below, whose pressure-resistant housing is formed by two half-shells which are connected by a first flange connection and in which the diaphragm and a loosening surface for the supply of swirling or pressurized gas into the pressure vessel of the diaphragm pump are connected by a second flange, wherein a uniform gas supply is achieved via the loosening surface which is half-shell-shaped and is designed to be gas-permeable, and the filter material for the loosening surface is formed by a porous metal having a sufficiently small pore size and a filter fineness of <20 μm.
The present invention utilizes the following recognition: for the operation of the diaphragm pump, it is important to supply the swirling gas in a uniformly distributed manner in the lower region of the powder pump. In the case of the loose element produced according to the invention, it is ensured that, by producing the arched filter element with a three-dimensional design, possible oiling of the material is avoided and a uniform porosity can be achieved.
The loose element made according to the invention has a constant porosity, thus ensuring: the finest powder particles do not penetrate into the loose surface during the pressure relief process of the powder chamber, which causes a uniformly distributed input of the swirling gas into the powder chamber during the pressurization process.
The invention makes it possible to design the powder chamber in a structurally simple manner, the contour of which is adapted particularly advantageously to the deflection of the diaphragm and, if appropriate, to the guide rod of the diaphragm. This results in a uniform and reversible deformation of the membrane and possibly a low wear.
After the delivery process of the diaphragm pump has ended, the diaphragm can be brought into substantially flat contact with the half-shell-shaped loose surface. A small dead volume can be achieved by this advantageous embodiment, which results in a minimum powder chamber volume, with a large conveying capacity and low high-pressure gas losses.
In a hydraulically driven diaphragm pump for the pneumatic high-pressure delivery of fluidized powder, which is equipped with a filter element produced according to the invention, the pressure vessel surrounding the powder chamber has a small size and a minimized wall thickness, which reduces the production effort.
In a particular embodiment of the invention, the loosening surface has a circular opening at the deepest point, to which a powder tube is fastened, by means of which powder-like conveying material can be fed in and out and thus cannot reach the gas chamber.
Drawings
The invention is explained in more detail below as an example in accordance with fig. 1 insofar as this is necessary for understanding.
Detailed Description
The diaphragm pump shown in fig. 1 is a device comprising two pressure-resistant half-shells 1, 12, which are connected to one another in a gas-tight manner via a flange connection 2. In addition to the simple assembly possibility of the powder pump, the flange connection has the additional function of: the membrane 3 and the loose side 5 are fixed and clamped via a filter flange 4. By means of the spherical geometry, the membrane can thus be deflected advantageously and with the exception of the filter material into the powder chamber in the shape of a paraboloid of revolution. Here, the diaphragm is deflected by the force action of a hydraulic fluid, as described, for example, in DE 102016201182. A sudden change is avoided and after the end of the dispensing process, the diaphragm 3 can be brought into contact with the half-shell-shaped loosening surface 5 essentially in a flat manner. A small dead volume can be achieved by this advantageous embodiment, which results in a minimum powder chamber volume 10, with a large conveying capacity and low high-pressure gas losses. In order to avoid undesired movements and folding during the output process, the membrane is guided and stabilized with respect to its movement via the guide rods 9. In a particularly advantageous embodiment, the guide rod can assume additional tasks, for example the determination of the position of the diaphragm via a position sensor in measurement technology.
Furthermore, the problem addressed by the present invention is to produce the dense flow transport described in DE2005047583 by generating a turbulent layer within the powder chamber. During the pressurization and removal process, a uniform gas supply via the half-shell-shaped porous surface 5, which is designed to be gas-permeable, takes care of this. As a filter material for the loose face 5, a porous metal, for example aluminum, is used, the pore size of which is sufficiently small and the filter fineness of which is <20 μm. It is thus ensured that: the finest powder particles do not intrude into the loose face during the pressure relief process.
To produce porous metal, liquid metal (for example aluminum) is poured into the half-shell mold together with granulated salt. The salts have, for example, a significantly higher melting point than metals such as aluminum and do not transform into a liquid, aggregated state, but are distributed homogeneously in the melt. After the metal has solidified, the salt is washed away by means of a liquid dissolving the salt and a porous and gas-permeable metal is produced. One advantage of this method is the possibility of machining before the salt crystals are washed away. Thereby excluding oiling the holes. The necessary porosity and fineness of filtration are adjusted via the size of the salt particles.
In order to achieve an advantageous flange seal 2, the loose side 5 can be constructed in two layers, as a porous metal in the lower region and from a solid material in the flange region.
In a particular embodiment of the invention, the half-shell-shaped cast shape of the loose face 5 is extended by additional annular and/or punctiform support elements 8. The loose face 5, which is half-shell-shaped and made of porous metal, can thus be fitted and fixed in the lower half-shell 12, which is pressure-resistant and made of solid material. Between the loose face made of porous metal and the pressure-resistant half-shell, a gas chamber 13 is advantageously created, which can be used for distributing the loose and pressurized gas. The supply and removal of the compressed and loosened gas takes place via the openings 6 in the pressure-resistant lower half-shell 12.
In a hydraulically driven diaphragm pump for the pneumatic high-pressure delivery of fluidized powder, the reliable sealing of the powder chamber and the hydraulic chamber, which are separated by the diaphragm, is of particular significance. The deflection of the diaphragm and the associated suction and discharge of the powdery conveying material are achieved by the pressing in and out of a hydraulic fluid in a hydraulic chamber located above the diaphragm. Within this transport process, the intrusion of powder into the hydraulic fluid or the intrusion of hydraulic fluid into the powder chamber is associated with considerable equipment malfunctions and can lead to costly repairs.
It is a feature of the present invention to monitor and ensure the sealing of the diaphragm. For this purpose, the diaphragm 3 is designed as a double diaphragm with an integrated pressure sensor for monitoring leakage. A tight, sealed separation between the hydraulic chamber 11 and the powder chamber 10 is thus ensured and damage to the diaphragm can be detected in a timely manner. Costly maintenance and cleaning measures of the entire powder system or hydraulic system are prevented in the event of damage to the membrane and the tightness of the membrane is maintained during a fault situation.
When the membrane 3 is designed as a double membrane, the two rubber-elastic membranes are arranged in mechanical support with respect to one another in such a way that a closed intermediate space is formed between the membranes, which can be monitored by means of the pressure sensor Δ p 14. In fault-free operation, the intermediate chamber has a lower pressure than the pressure in the hydraulic chamber or the powder chamber. If it is now determined that the pressure in the intermediate space is increasing, it is concluded that one of the two diaphragms of the double diaphragm is leaking. The two diaphragms can be arranged point by point mechanically supported to each other by arranging a layer of balls between them. The two diaphragms can be arranged in a mechanically supporting manner with respect to one another by introducing a coupling fluid between them, which is operatively connected to the pressure sensor Δ p.
The rubber-elastic membrane can be formed from an elastomer or a solid PTFE mixture. For a double membrane, one of the two membranes can be realized by an elastomer and the other of the two membranes by a solid PTFE mixture.
The invention is also achieved by a diaphragm pump for fluidizing and transporting powder, in which:
the pressure-resistant housing of the powder pump is formed by two half-shells which are connected by a flange connection and in which the diaphragm and the loosening face are flanged,
the loose surface is constructed in layers from a porous material in the lower region and from a solid material in the region of the flange connection,
the loosening face is configured as a half-shell, comprising the support element and there is a gas chamber between the pressure-resistant lower half-shell and the loosening face.
The present invention has been described in detail with reference to specific embodiments for the purpose of illustration. Here, elements of the respective embodiments may be combined with each other. Accordingly, the present invention should not be limited to a particular embodiment, but only by the appended claims.
List of reference numerals
1 compression-resistant upper half-shell and hydraulic half-shell
2 Container flange
3 diaphragm
4 Filter flange
Loose surface made of porous metal filtering material
6 opening for pressurizing and delivering gas, gas pipe
7 inner tube and powder tube for powder inlet and outlet
8-ring, point-like, strip-like support element
9 diaphragm guide/guide rod
10 powder chamber
11 hydraulic chamber
12 compression-resistant lower half-shell, powder half-shell
13 gas cavity
14 pressure sensor Δ p
Claims (3)
1. A diaphragm pump for fluidizing and transporting powder, the pressure-resistant housing of which is formed by two half-shells (1, 12) which are connected by means of a first flange connection (2) and in which a diaphragm (3) and a loosening surface (5) for supplying a swirling or pressurized gas into a pressure vessel of the diaphragm pump are connected by means of a second flange, wherein a uniform gas supply is achieved via the half-shell-shaped loosening surface (5) which is designed to be gas-permeable, and the filter material for the loosening surface (5) is formed by a porous metal having a sufficiently small pore size and a filter fineness of <20 [ mu ] m.
2. The diaphragm pump according to claim 1, wherein the loose side (5) has an opening at the deepest point, on which opening a powder tube (7) is arranged.
3. Diaphragm pump according to claim 1 or 2, characterized in that at least one support element (8) is cast on the loose face (5).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102016216016.8A DE102016216016A1 (en) | 2016-08-25 | 2016-08-25 | Production of a porous aluminum filter for a membrane pump |
| DE102016216016.8 | 2016-08-25 | ||
| PCT/EP2017/071073 WO2018036984A1 (en) | 2016-08-25 | 2017-08-22 | Production of a porous aluminium filter for a diaphragm pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109789356A CN109789356A (en) | 2019-05-21 |
| CN109789356B true CN109789356B (en) | 2021-12-03 |
Family
ID=59772595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780058412.2A Active CN109789356B (en) | 2016-08-25 | 2017-08-22 | Diaphragm pump for fluidizing and transporting powder |
Country Status (5)
| Country | Link |
|---|---|
| US (2) | US20190217233A1 (en) |
| EP (1) | EP3503987B1 (en) |
| CN (1) | CN109789356B (en) |
| DE (1) | DE102016216016A1 (en) |
| WO (1) | WO2018036984A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110529367B (en) * | 2019-07-26 | 2020-12-15 | 宁波钱湖石油设备有限公司 | Hydraulic end structure of high-pressure reciprocating diaphragm pump |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3138856A (en) * | 1961-10-09 | 1964-06-30 | Dow Chemical Co | Method of producing clad porous metal articles |
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- 2016-08-25 DE DE102016216016.8A patent/DE102016216016A1/en not_active Withdrawn
-
2017
- 2017-08-22 US US16/327,586 patent/US20190217233A1/en not_active Abandoned
- 2017-08-22 CN CN201780058412.2A patent/CN109789356B/en active Active
- 2017-08-22 WO PCT/EP2017/071073 patent/WO2018036984A1/en unknown
- 2017-08-22 EP EP17761455.9A patent/EP3503987B1/en active Active
-
2021
- 2021-07-29 US US17/388,470 patent/US11590440B2/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US3138856A (en) * | 1961-10-09 | 1964-06-30 | Dow Chemical Co | Method of producing clad porous metal articles |
Also Published As
| Publication number | Publication date |
|---|---|
| US11590440B2 (en) | 2023-02-28 |
| CN109789356A (en) | 2019-05-21 |
| EP3503987B1 (en) | 2022-03-16 |
| WO2018036984A1 (en) | 2018-03-01 |
| DE102016216016A1 (en) | 2018-03-15 |
| EP3503987A1 (en) | 2019-07-03 |
| US20190217233A1 (en) | 2019-07-18 |
| US20210354066A1 (en) | 2021-11-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20190619 Address after: Tony Watt, Germany Applicant after: Ernst Schmitz Machinery and Equipment Co., Ltd. Address before: Munich, Germany Applicant before: Siemens AG |
|
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |